Summary AQA A Level Physics Nuclear Physics revision notes

~
Apha <
Nuclear
Decay Equations
Lightinsidesource




i
2 proton 2 neutron 4 4 a Apha -- 4
,

& He
Sphere
&


Most ionising 2 2 24/




Mine
penetrating
Least ①


100 % of the
light incident the inside of the
Am
+ He ord
by thin paper air (few cm)
Absorbed & is on sphere 95


2
Slowest
-




*


, Intensity Wm- power per unit area
(proton >


BetaB minus & plus
J z

fast
moving
electron
B 2 The sphere above
Intensity to
·




,
I


ionising (penetrating
-




Santi
-
·
medium Areact small 2 Cu
4Tr
absorbed foil
by huminium
-

a
Sphere




I
and air (few metres) Beat
2
Area of
Gamma J &
j &

big
↑


- 4π(2r) 124

2
2r Sphere I C

electromagnetic ware
2
16 r
·

- ↓
52 ↑ neutri
most
penetrating
·




Electron


captiveV
least
ionising
·




lead/ concrete Intensity of small here 4 r2
-




thick to 16r2
absorbed
by
: 124 124
sp
· =




Rutherfords Alpha Scattering experiment 53



Intensity of
large Sphere by
-


↳ electrostatic
4
interaction


G2 thi Il




D
vacuum
X
v 4r2 -
↓
-
Nuclear
Physics
44(2r)
2


gold foil
pha
i 16 Tr2 lo I 4
-




2w


-
S




3r 36 Tr24(3r)2 19
& -




I j
speed

4π(4r) Nuclear Radivs
2
464/r
J
- · / 16
&




I
H CS
-




M
-
Fluorescent link
ing Intensity &
T If
you
double distance of
↑
&


FB M

↑ X then the
8 Eating
radioactive source
Yor quarter intensity
-




I
Has

2
③
Spee



Fa F
force
① Most alpha particles passed straight through the gold I
foil is
acting At this point fa is
this

way in the opposite